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  for(var i = 1; i <= 9; i++){
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  /*
  * 1*1=1  
  * 1*2=2  2*2=4  
  * 1*3=3  2*3=6  3*3=9  
  * 1*4=4  2*4=8  3*4=12  4*4=16  
  * 1*5=5  2*5=10  3*5=15  4*5=20  5*5=25  
  * 1*6=6  2*6=12  3*6=18  4*6=24  5*6=30  6*6=36  
  * 1*7=7  2*7=14  3*7=21  4*7=28  5*7=35  6*7=42  7*7=49  
  * 1*8=8  2*8=16  3*8=24  4*8=32  5*8=40  6*8=48  7*8=56  8*8=64  
  * 1*9=9  2*9=18  3*9=27  4*9=36  5*9=45  6*9=54  7*9=63  8*9=72  9*9=81  
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